The earliest known stone tools date back to at least 3.3 million years ago. They are identified by their purposeful flaking patterns, sharp edges, and location with other more identifiable artifacts or fossils. They are then verified with microscopic analysis confirming repetitive use.
Early Stone Tools
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Early Stone Tools
3.3 Million BCE (Hominins)
Prefrontal Cortex Expansion, Internal 3D modeling
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